RU81484U1 - UNIVERSAL PNEUMATIC DISCHARGE - Google Patents

Abstract

The utility model relates to devices for pneumatic supply of bulk material and can be used in the transportation of powdered, finely granulated and dusty material in food, agricultural, chemical and other industries. The objective of this technical solution is to create a compact universal pneumodoser combined with electric scales with the maximum simplification of the circuit with the unification of the main components. The problem is solved due to the fact that the pneumatic metering device consists of a working chamber, a feeder in the form of a lock chamber, a metering valve, an inlet valve, a check valve, a fan, electronic scales, logical control control, a main pneumatic pipeline and a level sensor.

Description

The utility model relates to devices for pneumatic supply of bulk material and can be used in the transportation of powdered, finely granulated and dusty material in food, agricultural, chemical and other industries.

A device for pneumatic feeding of bulk material is known as a disk feeder [1], which contains a hopper, the lower part of which is made in the form of a vertically arranged pipe, a horizontally arranged plate mounted on a vertical shaft under the lower end of the hopper pipe and a plate drive.

The disadvantage of this device is that the maximum pressure on the plate feeder is limited by a measuring device, which requires the use of an electric motor with increased power. In addition, it is impossible to unify the feeder drive for silos of different volumes.

A device for pneumatic transportation of powdered materials [2], containing a hopper with an aeration device, an ejector, a transport pipeline, a drive dispenser with an electric motor equipped with a rotational speed device made in the form of a thyristor converter.

A disadvantage of the known device is that the speed control of the metering drive changes the flow of material with unstable maintenance of the given speeds, setting the characteristics of the converter is limited.

A conveying device [3] is known, comprising a plurality of reservoirs discharged using a group of reservoirs located under the funnels of said reservoirs, in which, during loading of one of these reservoirs, the air flow is directed through the discharge pipe, and the material is introduced into this air flow into an open covering element funnels of one specified tank, in which the air flow is oriented in the direction of the lower

parts of the passage of the outlet of the drive. The overlapping element is formed by an air guide plate mounted to move between the closed position of the air direction in the position of the air direction.

The disadvantage of this device is that it is not reliable and does not allow the transportation of material to different elevations.

A device for pneumomechanical supply of bulk materials [4], containing a working chamber, a loading funnel, a pneumatic system, a drive plate feeder with cells, a pipe for forced discharge of the feeder with compressed gas, a material cutter, an outlet pipe. The device is equipped with a volumetric dosing system based on a logical controller and a disk feeder, which is made in the form of a set of disks, and a pressure stabilizer in the form of a visor is installed above the feeder in the case of the working chamber. The electric drive motor of the disk feeder is equipped with a speed control device made in the form of a transistor frequency converter, while the outlet pipe is equipped with a shut-off controlled valve.

The disadvantage of this technical solution is the complexity of the circuit due to the device blowing plates, as well as the installation of the counter pneumodoser.

The objective of this technical solution is to create a compact universal pneumatic metering unit, combined with electric scales with the maximum simplification of the circuit, with the unification of the main components for using the pneumatic metering unit in various working chambers.

The problem is solved by constructive study of the device.

Figure 1 presents the pneumatic metering device, consisting of a working chamber 1, a feeder in the form of a lock chamber 2, a metering valve 3, an inlet valve 4, a check valve 5, a fan 6, an electronic balance 7, a logical control control 8, a main pneumatic pipe 9, and a sensor level 10.

Air metering operation

The principle of operation of the pneumatic metering device is to combine coarse metering with a feeder 2, the volume of segments of which can be pre-set more than a predetermined and accurate metering through the metering valve 3. The gateway and metering valve are controlled by a logical control 8 depending on the readings of the electronic balance 7. Fan 6 creates the air pressure in the pneumatic conduit 9, necessary for supplying material through the inlet valve 4 and dispensing excess material through the dispensing valve 3 into the working chamber 1. At the command of the logical control of control 8, the dose of the feeder 2 is formed. 2. Weighing on the electronic balance 7 and, if the dose exceeds the norm, then dosing through the dosing valve 3. This closes the inlet valve 4. When the working chamber is full 1, a signal is generated from the level sensor 10 to the control logic 8, which issues a command to open the check valve 5 and close the inlet valve 4.

The use of this dispenser circuit allows you to hang a variety of bulk and dusty materials. There is a significant simplification and cheapening of the circuit in comparison with the prototype approximately 2 times.

At present, an industrial design of the proposed universal pneumodoser has been manufactured, which is currently being tested at LLC “First Partner” in the city of Gorno-Altaysk.

Information sources:

1. A.S. RF №1775344 dated June 4, 1990. IPC 7 В65G 53/48.

2. RF patent No. 2173663 dated 04/11/2000 IPC 7 B65G 53/48

3. DE No. 2645047 dated 03/09/1978 gy, IPC 7 B65G 53/08.

4. Patent K11 No. 34517 of July 2, 2002, MKP 7 B65G 53/00 (Prototype)

Claims (1)

A universal pneumatic metering device including a working chamber, a pneumatic system, a feeder and logical control, characterized in that the feeder is made in the form of a lock chamber, which also performs the function of constipation with the additional introduction of feedback to adjust the weight of the material.